implement scopemask cache blanking feature for packetcache

Author: ahupowerdns

pdns/packethandler.cc

@@ -1391,7 +1391,12 @@ DNSPacket *PacketHandler::questionOrRecurse(DNSPacket *p, bool *shouldRecurse)
     }
 
     editSOA(d_dk, sd.qname, r);
-    
+    BOOST_FOREACH(const DNSResourceRecord& rr, p->getRRS()) {
+      if(rr.scopeMask) {
+	noCache=1;
+	break;
+      }
+    }
     if(p->d_dnssecOk)
       addRRSigs(d_dk, B, authSet, r->getRRS());